133 lines
4.0 KiB
Factor
133 lines
4.0 KiB
Factor
! Copyright (C) 2007 Doug Coleman.
|
|
! See http://factorcode.org/license.txt for BSD license.
|
|
|
|
USING: alien arrays byte-arrays combinators
|
|
graphics.viewer io io.binary io.files kernel libc math
|
|
math.functions namespaces opengl opengl.gl prettyprint
|
|
sequences strings ui ui.gadgets.panes io.encodings.binary ;
|
|
IN: graphics.bitmap
|
|
|
|
! Currently can only handle 24bit bitmaps.
|
|
! Handles row-reversed bitmaps (their height is negative)
|
|
|
|
TUPLE: bitmap magic size reserved offset header-length width
|
|
height planes bit-count compression size-image
|
|
x-pels y-pels color-used color-important rgb-quads color-index array ;
|
|
|
|
: raw-bitmap>string ( str n -- str )
|
|
{
|
|
{ 32 [ "32bit" throw ] }
|
|
{ 24 [ ] }
|
|
{ 16 [ "16bit" throw ] }
|
|
{ 8 [ "8bit" throw ] }
|
|
{ 4 [ "4bit" throw ] }
|
|
{ 2 [ "2bit" throw ] }
|
|
{ 1 [ "1bit" throw ] }
|
|
} case ;
|
|
|
|
: parse-file-header ( bitmap -- )
|
|
2 read [ over set-bitmap-magic ] keep "BM" = [
|
|
"BITMAPFILEHEADER: First two bytes must be BM" throw
|
|
] unless
|
|
4 read le> over set-bitmap-size
|
|
4 read le> over set-bitmap-reserved
|
|
4 read le> swap set-bitmap-offset ;
|
|
|
|
: parse-bitmap-header ( bitmap -- )
|
|
4 read le> over set-bitmap-header-length
|
|
4 read le> over set-bitmap-width
|
|
4 read le> over set-bitmap-height
|
|
2 read le> over set-bitmap-planes
|
|
2 read le> over set-bitmap-bit-count
|
|
4 read le> over set-bitmap-compression
|
|
4 read le> over set-bitmap-size-image
|
|
4 read le> over set-bitmap-x-pels
|
|
4 read le> over set-bitmap-y-pels
|
|
4 read le> over set-bitmap-color-used
|
|
4 read le> swap set-bitmap-color-important ;
|
|
|
|
: rgb-quads-length ( bitmap -- n )
|
|
[ bitmap-offset 14 - ] keep bitmap-header-length - ;
|
|
|
|
: color-index-length ( bitmap -- n )
|
|
[ bitmap-width ] keep [ bitmap-planes * ] keep
|
|
[ bitmap-bit-count * 31 + 32 /i 4 * ] keep
|
|
bitmap-height abs * ;
|
|
|
|
: parse-bitmap ( bitmap -- )
|
|
dup rgb-quads-length read over set-bitmap-rgb-quads
|
|
dup color-index-length read swap set-bitmap-color-index ;
|
|
|
|
: load-bitmap ( path -- bitmap )
|
|
binary [
|
|
T{ bitmap } clone
|
|
dup parse-file-header
|
|
dup parse-bitmap-header
|
|
dup parse-bitmap
|
|
] with-file-reader
|
|
dup bitmap-color-index over bitmap-bit-count
|
|
raw-bitmap>string >byte-array over set-bitmap-array ;
|
|
|
|
: save-bitmap ( bitmap path -- )
|
|
binary [
|
|
"BM" write
|
|
dup bitmap-array length 14 + 40 + 4 >le write
|
|
0 4 >le write
|
|
54 4 >le write
|
|
|
|
40 4 >le write
|
|
dup bitmap-width 4 >le write
|
|
dup bitmap-height 4 >le write
|
|
dup bitmap-planes 1 or 2 >le write
|
|
dup bitmap-bit-count 24 or 2 >le write
|
|
dup bitmap-compression 0 or 4 >le write
|
|
dup bitmap-size-image 4 >le write
|
|
dup bitmap-x-pels 4 >le write
|
|
dup bitmap-y-pels 4 >le write
|
|
dup bitmap-color-used 4 >le write
|
|
dup bitmap-color-important 4 >le write
|
|
dup bitmap-rgb-quads write
|
|
bitmap-color-index write
|
|
] with-file-writer ;
|
|
|
|
M: bitmap draw-image ( bitmap -- )
|
|
dup bitmap-height 0 < [
|
|
0 0 glRasterPos2i
|
|
1.0 -1.0 glPixelZoom
|
|
] [
|
|
0 over bitmap-height abs glRasterPos2i
|
|
1.0 1.0 glPixelZoom
|
|
] if
|
|
[ bitmap-width ] keep
|
|
[
|
|
[ bitmap-height abs ] keep
|
|
bitmap-bit-count {
|
|
! { 32 [ GL_BGRA GL_UNSIGNED_INT_8_8_8_8 ] } ! broken
|
|
{ 24 [ GL_BGR GL_UNSIGNED_BYTE ] }
|
|
} case
|
|
] keep bitmap-array glDrawPixels ;
|
|
|
|
M: bitmap width ( bitmap -- ) bitmap-width ;
|
|
M: bitmap height ( bitmap -- ) bitmap-height ;
|
|
|
|
: bitmap. ( path -- )
|
|
load-bitmap <graphics-gadget> gadget. ;
|
|
|
|
: bitmap-window ( path -- )
|
|
load-bitmap [ <graphics-gadget> "bitmap" open-window ] keep ;
|
|
|
|
: test-bitmap24 ( -- )
|
|
"misc/graphics/bmps/thiswayup24.bmp" resource-path bitmap. ;
|
|
|
|
: test-bitmap8 ( -- )
|
|
"misc/graphics/bmps/rgb8bit.bmp" resource-path bitmap. ;
|
|
|
|
: test-bitmap4 ( -- )
|
|
"misc/graphics/bmps/rgb4bit.bmp" resource-path
|
|
load-bitmap ;
|
|
! bitmap. ;
|
|
|
|
: test-bitmap1 ( -- )
|
|
"misc/graphics/bmps/1bit.bmp" resource-path bitmap. ;
|
|
|